plt/racket — pull request #95 by jamessan (2012-04-11 03:55:42+00:00)
Title: racket/draw: Check for libpng15, libpng12, and libpng on unix

libpng 1.5 has started making its way into Linux distributions. This adds support for loading libpng15.so, but it's not as clean as the libjpeg changes were since the library has different names per-major version.